Model 19-4 6" re-barrel Question

[Centerx]

Can any other model 6" barrel mate up to a Model 19-4?

 

[bgrafsr]

I would think any K frame barrel would be able to be put on the 19's frame, but the contour where barrel/frame meet may not look right. I'm sure a Model 66 barrel would be the same as the 19 barrel.